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Tycho G

Star in the constellation Cassiopeia

Summary

Star in the constellation Cassiopeia

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Tycho G has been proposed as the surviving binary companion star of the SN 1572 supernova event. The star is located about light-years away in the constellation Cassiopeia. It is a subgiant, similar to the Sun in temperature, but more evolved and luminous.

Origin of the name

The supernova SN 1572 is often called "Tycho's supernova", named after Tycho Brahe who observed the "new star" in 1572. The postfix "G" originates from the candidate companion stars considered in a 2004 study, labelled Tycho A to Tycho V.

Evidence for companion hypothesis

Tycho G is travelling away from us at nearly 80 km/s, much faster than the mean velocity of other stars in its stellar neighbourhood. It matches the properties of some models for the pre-supernova star system, although other studies exclude it.

References

References

  1. (2014). "Search for Surviving Companions in Type Ia Supernova Remnants". The Astrophysical Journal.
  2. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues.
  3. (2004). "The binary progenitor of Tycho Brahe's 1572 supernova". Nature.
  4. (2013). "A High-resolution Spectroscopic Search for the Remaining Donor for Tycho's Supernova". The Astrophysical Journal.
  5. (2009). "The Chemical Abundances of Tycho G in Supernova Remnant 1572". The Astrophysical Journal.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

supernova-remnants cassiopeia-(constellation) g-type-subgiants
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